宝石::规范错误-Rails 3答案

【问题标题】：Gem::Specification Error - Rails 3宝石::规范错误-Rails 3
【发布时间】：2012-06-02 02:18:43
【问题描述】：

我有一个新的 Rails 安装，当我尝试运行控制台或任何 rake 任务时，我收到如下所示的错误消息：

$ rails c
[/.rvm/gems/ruby-1.9.2-p320/specifications/json_pure-1.7.0.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/engineyard-1.4.29.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/launchy-2.0.5.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/engineyard-serverside-adapter-1.6.4.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/escape-0.0.4.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/highline-1.6.11.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/net-ssh-2.2.2.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/json_pure-1.7.0.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/engineyard-1.4.29.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/launchy-2.0.5.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/engineyard-serverside-adapter-1.6.4.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/escape-0.0.4.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/highline-1.6.11.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/net-ssh-2.2.2.gemspec] isn't a Gem::Specification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/json_pure-1.7.0.gemspec] isn't a Gem::Specification (NilClss instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/engineyard-1.4.29.gemspec] isn't a Gem::Specification (Nillass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/launchy-2.0.5.gemspec] isn't a Gem::Specification (NilClas instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/engineyard-serverside-adapter-1.6.4.gemspec] isn't a Gem::pecification (NilClass instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/escape-0.0.4.gemspec] isn't a Gem::Specification (NilClassinstead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/highline-1.6.11.gemspec] isn't a Gem::Specification (NilClss instead).
[/.rvm/gems/ruby-1.9.2-p320/specifications/net-ssh-2.2.2.gemspec] isn't a Gem::Specification (NilClas instead).
/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/irb/completion.rb:9:in `require': no such file to load --readline (LoadError)
        from /.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/irb/completion.rb:9:in `<top (required)>'
        from /.rvm/gems/ruby-1.9.2-p320/gems/railties-3.0.4/lib/rails/commands/console.rb:3:in `requie'
        from /.rvm/gems/ruby-1.9.2-p320/gems/railties-3.0.4/lib/rails/commands/console.rb:3:in `<top required)>'
        from /.rvm/gems/ruby-1.9.2-p320/gems/railties-3.0.4/lib/rails/commands.rb:20:in `require'
        from /.rvm/gems/ruby-1.9.2-p320/gems/railties-3.0.4/lib/rails/commands.rb:20:in `<top (requird)>'
        from script/rails:6:in `require'
        from script/rails:6:in `<main>'

任何想法可能导致这种情况？

谢谢。

【问题讨论】：

标签： ruby-on-rails-3

【解决方案1】：

我认为是readline

/.rvm/rubies/ruby-1.9.2-p320/lib/ruby/1.9.1/irb/completion.rb:9:in `require': 没有要加载的文件--readline (LoadError)

这里有一些资源：

https://rvm.io//packages/readline/

Problems with the rails console, RVM and readline

如果上述方法对您不起作用，那么您可以按照我的做法在此处使用解决方案：

Rails3 and readline problem

这是在您的项目中包含 rb-readline gem。（我不确定这是否被认为是黑客攻击）

https://github.com/luislavena/rb-readline

希望对您有所帮助。我花了一段时间才让控制台工作一次，而且有时令人沮丧。更不用说在更新了一些 Ubuntu 软件包后我不得不再次这样做。

【讨论】：